package t4tools.etodo.command;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IWorkbenchPage;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.handlers.HandlerUtil;

import t4tools.etodo.editor.TodoEditor;
import t4tools.etodo.editor.TodoEditorInput;
import t4tools.etodo.model.Todo;
import t4tools.etodo.views.TODOsView;

public class OpenTodoEditorHandler extends AbstractHandler {

	@Override
	public Object execute(ExecutionEvent event) throws ExecutionException {
		// Get the view
		IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindow(event);
		IWorkbenchPage page = window.getActivePage();
		TODOsView view = (TODOsView) page.findView(TODOsView.ID);
		// Get the selection
		ISelection selection = view.getSite().getSelectionProvider().getSelection();
		if (selection != null && selection instanceof IStructuredSelection) {
			Object obj = ((IStructuredSelection) selection).getFirstElement();
			// If we had a selection lets open the editor
			if (obj != null && obj instanceof Todo) {
				Todo todo = (Todo) obj;
				TodoEditorInput input = new TodoEditorInput(todo);
				try {
					page.openEditor(input, TodoEditor.ID);

				} catch (PartInitException e) {
					throw new RuntimeException(e);
				}
			}
		}
		return null;
	}

}
